Total Solar Transmission: Percentage of total solar energy (ultraviolet, visible and infrared) that is allowed to pass through a window and associated window treatments.

Total Solar Reflection: Percentage of total solar energy (ultraviolet, visible and infrared) that is reflected outwards by the window and associated window treatments.

Total Solar Absorptance: Percentage of total solar energy (ultraviolet, visible and infrared) that is absorbed or built up in the window and associated window treatments compared to the total available energy in the full solar spectrum. This is the amount of total solar energy that is neither reflected outside nor transmitted inside.

Shading Coefficient: A factor that defines the performance of a window and associated window treatments to control total solar energy by a measurement system based on clear, 3 millimeter thick glass. The lower the value the better the control.

Visible Light Transmission: Percentage of visible solar energy that is allowed to pass through a window and associated window treatments.